Q13.Is string a wrapper class?String is a class, but not a wrapper class. Wrapper classes like (Integer) exist for each primitive type. They can be used to convert a primitive data value into an object, and viceversa.

Q14.Why java does not have multiple inheritance?The Java design team strove to make Java:
• Simple, object oriented, and familiar
• Robust and secure
• Architecture neutral and portable
• High performance
• Interpreted, threaded, and dynamic
The reasons for omitting multiple inheritance from the Java language mostly stem from the "simple, object oriented, and familiar" goal. As a simple language, Java's creators wanted a language that most developers could grasp without extensive training. To that end, they worked to make the language as similar to C++ as possible (familiar) without carrying over C++'s unnecessary complexity (simple).
In the designers' opinion, multiple inheritance causes more problems and confusion than it solves. So they cut multiple inheritance from the language (just as they cut operator overloading). The designers' extensive C++ experience taught them that multiple inheritance just wasn't worth the headache.

Q15.Why java is not a 100% oops?Many people say this because Java uses primitive types such as int, char, double. But then all the rest are objects. Confusing question.

Q16.What is a resource bundle?In its simplest form, a resource bundle is represented by a text file containing keys and a text value for each key.